NATIONAL FOREWORD

This Indian Standard (Part 8) which is identical with ISO 13365 : 2011 ‘Leather - Chemical tests - Determination of the preservative (TCMTB, PCMC, OPP, OIT) content in leather by liquid chromatography’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Leather, Tanning Material and Allied Products Sectional Committee and approval of the Chemical Division Council.

This standard, which was originally published in 1954 and subsequently revised as IS 582 : 1970 ‘Methods of chemical testing of leather (first revision)’ prescribes the methods of chemical testing for all types of leathers. The Committee has decided to harmonize the methods of test prescribed in IS 582 with those prescribed in ISO/IULTCS standards. Accordingly, the committee decided to retain IS 582 and publish the harmonized/adopted test methods published by ISO/IULTCS in various parts of IS 582 as this standard is widely recognized by the Indian Leather Industry.

The committee further decided to publish the adopted/harmonized standards in the following manner:

a) Wherever an existing test method is being replaced by the corresponding ISO/IULTCS test method, the relevant part will be published with the information in the National Foreword about the method of IS 582 being superseded.

b) When a new test method is being incorporated in IS 582, the same will be published as a new standard and as subsequent part of IS 582.

This Part of IS 582 prescribes a method for ditermination of preservatives in leather. The other parts of this standard are:

Part 1 Determination of volatile matter

Part 2 Water soluble matter, water soluble inorganic matter and water soluble organic matter

Part 3 Sulphate total ash and sulphated water-insoluble ash

Part 4 Free formaldehyde in process auxiliaries

Part 5 Certain azo colourants in dyed leather

Section 1 Certain aromatic amines derived from azo colourants

Section 2 4-aminoazobenzene

Part 6 Metal content

Section 1 Extractable metals

Section 2 Total metal content

Part 7 Quantitative analysis of tanning agents by filter method

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.